this post was submitted on 28 Mar 2024
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'Garlic gems' by Ulrich Vogl (lemmy.ml)
submitted 7 months ago by quinacridone@lemmy.ml to c/abstractphotography@lemmy.ml
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'Garlic gems, Calcium oxalate crystals in garlic peel' by Ulrich Vogl

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[–] eatCasserole@lemmy.world 2 points 7 months ago (1 children)

Is this what gives it the purple colouring?

[–] quinacridone@lemmy.ml 2 points 7 months ago (1 children)

I'm fairly certain the crystals are calcium oxalate

....showing crystals of calcium oxalate (black-edged rectangles). These crystals embedded in the cell cytoplasm are known as raphides. Calcium oxalate crystals are common in the stems and leaves of many plants; they have no known metabolic function other than to serve as a means of disposal of excess calcium in the plant. source

Calcium oxalate can form kidney stones!

And, also this...

Garlic can be purple because of two reasons: it is one of the “hardneck” varieties of garlic with purple stripes or because your white garlic reacted with something acidic. Both are safe to eat and can be used in a variety of dishes. source

So I imagine that the purple garlic comes from the variety, and not the crystals

[–] eatCasserole@lemmy.world 1 points 7 months ago

Interesting...I usually buy the purple garlic just because it looks cooler. Now I wanna try getting acid on some white garlic, see if I can make purple garlic!